//Released under the MIT License.
//
//Copyright (c) 2015 Ntreev Soft co., Ltd.
//
//Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated 
//documentation files (the "Software"), to deal in the Software without restriction, including without limitation the 
//rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit 
//persons to whom the Software is furnished to do so, subject to the following conditions:
//
//The above copyright notice and this permission notice shall be included in all copies or substantial portions of the 
//Software.
//
//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
//WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR 
//COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
//OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;

namespace Ntreev.Library.Psd
{
    public abstract class PsdResolver
    {
        public abstract PsdDocument GetDocument(Uri absoluteUri);

        public virtual Uri ResolveUri(Uri baseUri, string relativeUri)
        {
            if ((baseUri == null) || (!baseUri.IsAbsoluteUri && (baseUri.OriginalString.Length == 0)))
            {
                Uri uri = new Uri(relativeUri, UriKind.RelativeOrAbsolute);
                if (!uri.IsAbsoluteUri && (uri.OriginalString.Length > 0))
                {
                    uri = new Uri(Path.GetFullPath(relativeUri));
                }
                return uri;
            }
            if ((relativeUri == null) || (relativeUri.Length == 0))
            {
                return baseUri;
            }
            if (!baseUri.IsAbsoluteUri)
            {
                throw new NotSupportedException("PSD_RelativeUriNotSupported");
            }
            return new Uri(baseUri, relativeUri);
        }
    }
}
